Frequently Asked Questions

Peptides are short chains of amino acids — typically between 2 and 50 amino acids in length — that serve as signalling molecules in biological systems. ZENTRA supplies high-purity research peptides, pre-mixed peptide pens, bacteriostatic water, and laboratory essentials. All products are manufactured at GMP-compliant facilities and independently tested to verify purity of 99%+.

No. All ZENTRA products are sold strictly for in-vitro research and laboratory use only. They are not intended for human consumption, veterinary use, or any clinical application. By purchasing from ZENTRA, you confirm that products will be used solely for legitimate scientific research purposes.

Our products are available to researchers, laboratories, academic institutions, and individuals conducting legitimate scientific research. All buyers must be 21 years of age or older and agree to our Acceptable Use Policy and Research Disclaimer at the point of purchase.

Simply browse our catalogue, add items to your cart, and proceed to checkout. Our secure checkout process will guide you through entering your shipping details and payment information. You will receive an order confirmation email immediately after purchase, followed by a dispatch notification with tracking details.

We accept all major credit and debit cards (Visa, Mastercard, American Express), Apple Pay, Google Pay, and bank transfers via our secure checkout. All transactions are encrypted and processed through PCI-compliant payment gateways.

Yes. For orders of 10+ units or regular laboratory supply requirements, we offer competitive wholesale pricing. Please contact us at info@zentra-peptides.com with your requirements and we will provide a tailored quote within 24 hours.

UK Orders: Same-day dispatch on orders placed before 3pm GMT (Monday–Friday). Standard delivery takes 1–2 working days. Free shipping on orders over £100.

International Orders: We ship worldwide. International delivery typically takes 5–10 working days depending on destination. Tracking is provided on all shipments.

All orders are shipped in plain, unmarked packaging for complete discretion. Temperature-sensitive items are packed with appropriate cold-chain materials during warmer months.

Yes, we ship to most countries worldwide. International shipping rates are calculated at checkout based on destination and package weight. Please note that customers are responsible for any customs duties or import taxes that may apply in their country.

Due to the nature of research compounds, we cannot accept returns on opened or used products. However, we offer full refunds or replacements in the following circumstances:

• Product arrives damaged or broken during transit
• Incorrect item received
• Product fails to meet stated purity specifications
• Order not received within the stated delivery timeframe

Please contact us within 14 days of delivery at info@zentra-peptides.com with your order number and photos of any damage.

Every ZENTRA product undergoes independent third-party testing. You can verify purity in two ways:

1. QR Code: Each vial includes a QR code on the label that links directly to the batch-specific Certificate of Analysis.

2. Online Verification: Visit our Verify Testing page and enter your batch number to view the full CoA.

All ZENTRA peptides are guaranteed to have a minimum purity of 99%+ as verified by independent HPLC analysis. We do not release any batch that falls below this threshold.

To reconstitute lyophilised (freeze-dried) peptides:

1. Allow the vial to reach room temperature.
2. Using a sterile syringe, slowly inject bacteriostatic water (BAC water) into the vial, aiming the stream against the glass wall.
3. Gently swirl (do not shake) until the powder is fully dissolved.
4. Store the reconstituted solution at 2–8°C and use within 30 days.

Use our Mixing Calculator to determine the correct volume of BAC water for your desired concentration.

Lyophilised (unreconstituted): Store in a cool, dry place away from direct sunlight. For long-term storage (6+ months), refrigerate at 2–8°C. For extended preservation, store at -20°C.

Reconstituted: Store at 2–8°C (standard refrigerator). Use within 30 days of reconstitution. Avoid repeated freeze-thaw cycles.

Bacteriostatic Water (BAC water) is sterile water containing 0.9% benzyl alcohol as a bacteriostatic preservative. It inhibits bacterial growth, making it suitable for reconstituting lyophilised peptides for research use.

Click “My Account” in the top right or visit zentra-peptides.com/my-account. Registration is free and takes 30 seconds. Having an account lets you track orders, earn loyalty points, and access exclusive discounts.

ZENTRA Rewards is our loyalty programme. Earn points on every purchase, which can be redeemed for discounts on future orders. The more you shop, the more you save. Visit our Rewards page for full details.

You earn points automatically on every order placed through your account. Points accumulate and can be applied as a discount at checkout. Create an account to start earning immediately.

Our affiliate programme lets you earn commission on every sale made through your unique referral link. Share your link with your audience and earn up to 30% commission on qualifying orders. It’s free to join.

Visit our Affiliates page and complete the application form. Applications are reviewed within 1-2 business days. Once approved, you’ll receive your unique referral link and discount codes via email.

When someone makes a purchase using your referral link, you earn a percentage of the order value. Commission rates start at 10% and can increase based on performance. Earnings are tracked in your affiliate dashboard.

Absolutely! Many of our affiliates are also customers. You can use your own discount codes for personal purchases (subject to terms) and earn commission by referring others.

Enter your discount code in the “Coupon code” field on the basket or checkout page and click “Apply coupon”. The discount will be applied to your order total immediately.

No, only one discount code can be applied per order. The system will automatically apply the code offering the best value if multiple are entered.

Yes, most promotional codes have an expiry date which will be stated in the email or promotion where you received the code. Affiliate referral links do not expire.

Yes. Research peptides are legal to purchase, possess, and sell in the UK for legitimate research purposes. They are not controlled substances. However, they must not be sold or marketed for human consumption.

No licence is required to purchase research peptides in the UK for personal research use. However, all buyers must confirm they are 21+ and agree to our Acceptable Use Policy.

All ZENTRA products are sold exclusively for in-vitro research and laboratory use. We do not condone or support the use of our products for human consumption or any clinical application. Full details are available on our Research Disclaimer page.

You can reach our team via:

Email: info@zentra-peptides.com
Contact Form: Visit our Contact Us page

We aim to respond to all enquiries within 24 hours during business days (Monday–Friday, 9am–5pm GMT).

While we cannot provide specific research protocols or dosing guidance (as all products are for research use only), our team can assist with general product information, storage recommendations, reconstitution guidance, and Certificate of Analysis interpretation.